Resumo

FIORI, Ana Paula Santos de Melo et al. Preparation and characterization of polymer nanocomposites based on chitosan and clay minerals. Polímeros [online]. 2014, vol.24, n.5, pp.628-635.  Epub 30-Set-2014. ISSN 0104-1428.  https://doi.org/10.1590/0104-1428.1572.

In this work nanocomposites based on chitosan and different clays were prepared using polyethyleneglycol (PEG) as plasticizer. The samples obtained were characterized by Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), thermogravimetric analysis (TGA/DTG) and by mechanical characterization (tensile test) with the aim of investigating the interactions between chitosan and clay. The nanocomposite films prepared using sodium bentonite (Ben) showed an increase of 81.2% in the maximum tensile stress values and a decrease of 16.0% in the Young's modulus when compared to the chitosan with PEG (QuiPEG) films, evidencing that the introduction of the clay into the polymer matrix provided a more flexible and resistant film, whose elongation at break was 93.6% higher than for the QuiPEG film.

Palavras-chave : Organophilic clay; nanocomposite films; biopolymer.

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